CN-120160888-B - Realize high accuracy diamond and to anvil cell pressure dynamic regulation and control device

CN120160888BCN 120160888 BCN120160888 BCN 120160888BCN-120160888-B

Abstract

A dynamic regulation and control device for realizing high-precision diamond anvil cell pressure relates to a diamond anvil cell pressure regulation and control device. The invention aims to solve the technical problem that the upper and lower diamond anvil surfaces generate asymmetric stress distribution due to non-uniform loading of the existing diamond anvil during pressurizing. The invention discloses a dynamic pressure regulating and controlling device for a high-precision diamond anvil cell, which has an axisymmetric structure and is composed of an inner hexagonal wrench, a sleeve box, a first gear, an inner hexagonal sleeve and a gear. According to the invention, the two inner hexagonal wrenches are applied with opposite force, and the two inner hexagonal wrenches are simultaneously reversely rotated by different angles through the mutual engagement of the four gears in the middle, so that the same pressure is applied to the diamond anvil cell, the screw can be accurately controlled to be screwed into the same distance, and even force is applied to the diamond anvil cell, so that the pressure and distribution uniformity of the diamond anvil cell are accurately controlled.

Inventors

LI YANG
XIE XIANGFU
FU JIERUI
LIU YUE
WANG JIAPENG
ZHEN LIANG
XU CHENGYAN

Assignees

哈尔滨工业大学

Dates

Publication Date: 20260512
Application Date: 20250324

Claims (10)

1. The device is characterized by being of an axisymmetric structure, and specifically comprises a first inner hexagonal wrench, a second inner hexagonal wrench, a sleeve box (3), a first gear (4), a first inner hexagonal sleeve, a second inner hexagonal sleeve, a first gear hub (8), a second gear hub (9), a second gear (13), a third gear (14) and a fourth gear (15); the first inner hexagonal wrench and the second inner hexagonal wrench are identical in structure and size; The first inner hexagonal wrench is vertically composed of a first thin rod (1) and a second thin rod (12), the second thin rod (12) passes through the central axis of the second gear (13), and the second thin rod (12) and the second gear (13) are in a relatively fixed relation, wherein the second thin rod (12) is of a regular hexagonal prism structure; The second inner hexagonal wrench is vertically composed of a third thin rod (2) and a fourth thin rod (5), the fourth thin rod (5) penetrates through the central axis of the first gear (4), and the fourth thin rod (5) and the first gear (4) are in a relatively fixed relation, wherein the fourth thin rod (5) is of a regular hexagonal prism structure; The inner cavity of the sleeve box (3) is of a hollow structure, a second gear (13), a third gear (14), a fourth gear (15) and a first gear (4) are sequentially arranged in the inner cavity according to the placement position, the structures and the sizes of the four gears are identical, the four gears are mutually meshed with the adjacent gears, a first gear hub (8) is fixed on the central axis of the third gear (14), a second gear hub (9) is fixed on the central axis of the fourth gear (15), the first gear hub (8) and the second gear hub (9) are vertically arranged in the inner cavity of the sleeve box (3) and are in close contact with the top and the bottom of the sleeve box (3), the first gear hub (8) and the second gear hub (9) are in sliding connection with the top and the bottom of the sleeve box (3), and the second thin rod (12) and the fourth thin rod (5) penetrate through the top and the bottom of the sleeve box (3), and the second thin rod (12) and the fourth thin rod (5) are in sliding connection with the top and the bottom of the sleeve box (3); The first inner hexagon socket and the second inner hexagon socket are identical in structure and size; the first inner hexagon sleeve consists of a first sleeve (11) and a first regular hexagon (10), one end of the first sleeve (11) is relatively fixed with the first regular hexagon (10), the other end of the first sleeve (11) is sleeved on the lower free end of the second slender rod (12), and the inner cavity of the first sleeve (11) is matched with the structure of the lower free end of the second slender rod (12); the second inner hexagonal sleeve consists of a second sleeve (6) and a second regular hexagonal prism (7), one end of the second sleeve (6) is relatively fixed with the second regular hexagonal prism (7), the other end of the second sleeve (6) is sleeved on the lower free end of the fourth thin rod (5), and the inner cavity of the second sleeve (6) is matched with the structure of the lower free end of the fourth thin rod (5).
2. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1 is characterized in that the length of the first slender rod (1) is 10 cm-13 cm.
3. The device for realizing dynamic pressure regulation and control of the high-precision diamond anvil cell according to claim 1, wherein the first sleeve (11) is made of stainless steel.
4. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1 is characterized in that the first slender rod (1) and the second slender rod (12) are of an integrated structure.
5. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1, wherein the third gear (14) and the first gear hub (8) are of an integrated structure.
6. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1, wherein the fourth gear (15) and the second gear hub (9) are of an integrated structure.
7. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1, wherein the sleeve box (3) is of a cuboid structure.
8. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1, wherein the second slender rod (12) and the second gear (13) are of an integrated structure.
9. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1, wherein the fourth thin rod (5) and the first gear (4) are of an integrated structure.
10. The device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure according to claim 1, wherein the length of the third slender rod (2) is 10 cm-13 cm.

Description

Realize high accuracy diamond and to anvil cell pressure dynamic regulation and control device Technical Field The invention relates to a diamond anvil cell pressure regulating device. Background Diamond anvil cell (Diamond ANVIL CELL, DAC) is used as a core device for high-pressure scientific research, and extreme hydrostatic pressure (300-500 GPa, which is equivalent to several times of the ground core pressure under the current laboratory conditions) is generated through a tiny contact area (usually only tens to hundreds of microns in diameter) between two Diamond anvil cells, so that the Diamond anvil cell has become an irreplaceable tool for exploring the behavior of substances under the extreme condition of ultrahigh pressure. The application fields of the method comprise condensed state physics (such as high-temperature superconducting mechanism research), earth science (mantle mineral phase change simulation), material chemistry (novel super-hard material synthesis) and celestial body physics (giant planet internal substance state analysis). However, the existing DAC device has the problem that the actual application has insufficient pressure control precision, the current mainstream pressurizing system relies on four symmetrically distributed precise threaded rods (most of materials are hardened stainless steel or tungsten carbide alloy), pressurizing screws positioned at diagonal positions are manually and alternately screwed in through two wrenches, the screw-in quantity difference of different screws can reach 5-10 mu m magnitude due to lack of real-time pressure feedback and synchronous control mechanism in the operation process, and asymmetric stress distribution (the local stress concentration coefficient can reach 1.3-1.8) can be generated on upper and lower diamond anvil surfaces due to non-uniform loading. At present, a diamond anvil cell device which is compact in structure, simple and convenient to operate and capable of realizing high-precision pressure dynamic regulation is needed so as to break through the bottleneck of pressure control in high-pressure experiments and meet the urgent requirement of leading-edge scientific research on precise control of extreme conditions. Disclosure of Invention The invention aims to solve the technical problem that the upper and lower diamond anvil surfaces generate asymmetric stress distribution due to non-uniform loading of the existing diamond anvil cell during pressurization, and provides a device for realizing dynamic regulation and control of high-precision diamond anvil cell pressure. The invention discloses a dynamic regulation and control device for realizing high-precision diamond anvil cell pressure, which has an axisymmetric structure and specifically comprises a first socket head wrench, a second socket head wrench, a sleeve box 3, a first gear 4, a first socket head socket, a second socket head socket, a first gear hub 8, a second gear hub 9, a second gear 13, a third gear 14 and a fourth gear 15; the first inner hexagonal wrench and the second inner hexagonal wrench are identical in structure and size; the first inner hexagonal wrench is vertically composed of a first thin rod 1 and a second thin rod 12, the second thin rod 12 passes through the central axis of a second gear 13, and the second thin rod 12 and the second gear 13 are in a relatively fixed relation, wherein the second thin rod 12 is of a regular hexagonal prism structure; the second inner hexagonal wrench is vertically composed of a third thin rod 2 and a fourth thin rod 5, wherein the fourth thin rod 5 penetrates through the central axis of the first gear 4, and the fourth thin rod 5 and the first gear 4 are in a relatively fixed relation; The inner cavity of the sleeve box 3 is of a hollow structure, a second gear 13, a third gear 14, a fourth gear 15 and a first gear 4 are sequentially arranged in the inner cavity according to the arrangement position, the structures and the sizes of the four gears are identical, the four gears are mutually meshed with the adjacent gears, a first gear hub 8 is fixed on the central axis of the third gear 14, a second gear hub 9 is fixed on the central axis of the fourth gear 15, the first gear hub 8 and the second gear hub 9 are vertically arranged in the inner cavity of the sleeve box 3 and are in close contact with the top and the bottom of the sleeve box 3, the first gear hub 8 and the second gear hub 9 are in sliding connection with the top and the bottom of the sleeve box 3, the second thin rod 12 and the fourth thin rod 5 penetrate through the top and the bottom of the sleeve box 3, and the second thin rod 12 and the fourth thin rod 5 are in sliding connection with the top and the bottom of the sleeve box 3; The first inner hexagon socket and the second inner hexagon socket are identical in structure and size; the first inner hexagonal sleeve consists of a first sleeve 11 and a first regular hexagonal prism 10, one end of the fir